As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURNED TO SFO DUE TO RIGHT ENGINE FUEL FILTER EICAS MESSAGE. REMOVED AND REPLACED NR 2 ENGINE DRIVEN FUEL PUMP. SHOP TEARDOWN REVEALED THAT THE PUMP HAD INTERNAL DAMAGE AS THE RESULT OF A MISSING THRUST WASHER. ALTHOUGH IT COULD NOT BE PROVEN CONCLUSIVELY, BASED ON THE PUMP TIME, IT IS BELIEVED THAT THE THRUST WASHER BROKE APART, RATHER THAN BEING OMITTED AT ASSEMBLY.